flow like the river

BACK_BACK/node_modules/buffer/test/node/test-buffer-ascii.js

@@ -0,0 +1,28 @@
+'use strict';
+var Buffer = require('../../').Buffer;
+
+
+var assert = require('assert');
+
+// ASCII conversion in node.js simply masks off the high bits,
+// it doesn't do transliteration.
+assert.equal(Buffer.from('hérité').toString('ascii'), 'hC)ritC)');
+
+// 71 characters, 78 bytes. The ’ character is a triple-byte sequence.
+var input = 'C’est, graphiquement, la réunion d’un accent aigu ' +
+            'et d’un accent grave.';
+
+var expected = 'Cb\u0000\u0019est, graphiquement, la rC)union ' +
+               'db\u0000\u0019un accent aigu et db\u0000\u0019un ' +
+               'accent grave.';
+
+var buf = Buffer.from(input);
+
+for (var i = 0; i < expected.length; ++i) {
+  assert.equal(buf.slice(i).toString('ascii'), expected.slice(i));
+
+  // Skip remainder of multi-byte sequence.
+  if (input.charCodeAt(i) > 65535) ++i;
+  if (input.charCodeAt(i) > 127) ++i;
+}
+